21740193292 has 12 divisors (see below), whose sum is σ = 38048335696. Its totient is φ = 10869240240.

The previous prime is 21740193289. The next prime is 21740193301. The reversal of 21740193292 is 29239104712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155184 + ... + 259927.

Almost surely, 2^21740193292 is an apocalyptic number.

It is an amenable number.

21740193292 is a deficient number, since it is larger than the sum of its proper divisors (16308142404).

21740193292 is a wasteful number, since it uses less digits than its factorization.

21740193292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428208 (or 428206 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 21740193292 in words is "twenty-one billion, seven hundred forty million, one hundred ninety-three thousand, two hundred ninety-two".